<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        html, body {
            width: 100%;
            height: 100%;
        }
        .pdf-holder {
            width: 100%;
            height: 100%;
            border: 1px solid #000;
        }
    </style>
</head>
<body>
    <iframe class="pdf-holder" src="./pdfjs-4.4.168/web/viewer.html"></iframe>
</body>
</html>